 Structure charts (last lesson)  Screen and page layout diagrams provide  A sketch of each page (screen) of the program  A list of the content, including.

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Presentation transcript:

 Structure charts (last lesson)  Screen and page layout diagrams provide  A sketch of each page (screen) of the program  A list of the content, including variables, text, graphics etc. and production notes.  Should be detailed enough for someone to write the program for you

 IPO Charts (Input, Processing, Output)  A table with three columns or boxes, providing details of the input required, the processing that will take place and the output that will be provided  Data Dictionaries  A table that has a list of the variables, with their properties and how they will be used.  Some of the headings are Variable Name, Type of Data, Purpose, Size of Data, Restrictions, etc.

 An algorithm is a set of well-defined instructions for accomplishing a task.  Like a recipe but can be more complex  Should cover all possible situations  Pseudocode (structured English)  Often very similar to the programming language itself

 Flow Charts are limited in that they can only show things in a sequence. A program is represented as a sequence of blocks.  Nassi-Schneidermann (N-S) Diagrams have more detail than flow charts because there is structure inside the blocks.